149605730521 has 9 divisors (see below), whose sum is σ = 162004549629. Its totient is φ = 138092955936.

The previous prime is 149605730501. The next prime is 149605730569. The reversal of 149605730521 is 125037506941.

The square root of 149605730521 is 386789.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8725614921 + 140880115600 = 93411^2 + 375340^2 .

It is not a de Polignac number, because 149605730521 - 2¹⁵ = 149605697753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149605730501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5013381 + ... + 5043133.

Almost surely, 2^149605730521 is an apocalyptic number.

149605730521 is the 386789-th square number.

149605730521 is the 193395-th centered octagonal number.

It is an amenable number.

149605730521 is a deficient number, since it is larger than the sum of its proper divisors (12398819108).

149605730521 is an frugal number, since it uses more digits than its factorization.

149605730521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59532 (or 29766 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 149605730521 in words is "one hundred forty-nine billion, six hundred five million, seven hundred thirty thousand, five hundred twenty-one".